Patents
Sitemap › F04 - Positive-displacement machines for liquids; Pumps for liquids or elastic fluids › F04B - Positive-displacement machines for liquids; Pumps › F04B 47 - Pumps or pumping installations specially adapted for raising fluids from great depths, e.g. well pumps
Patents for F04B 47 - Pumps or pumping installations specially adapted for raising fluids from great depths, e.g. well pumps (5,485)
07/1999
07/07/1999CN2327805Y Powerful thick oil pump with hydraulic feedback
07/01/1999WO1999032813A1 Stuffing box
07/01/1999WO1999019623A3 Hydraulic diaphragm pump
06/1999
06/30/1999CN1221470A Pump-off controller
06/23/1999CN2325556Y Wind power water pump
06/23/1999CN2325555Y Screw type direction changeable oil well pump
06/23/1999CN2325554Y Friction type direction changeable oil well pump
06/23/1999CN2325553Y Mobile oil well pump
06/23/1999CN2325552Y Fishing type oil well pump
06/16/1999CN2324316Y Strike-off plunger type sandproof oil well pump
06/09/1999CN2323171Y Long stroke energy-saving pumping unit
06/09/1999CN2323170Y Double four-bar beam-pumping unit with second connecting rod
06/02/1999CN2321957Y Special ceramic pipe type oil pump
06/01/1999US5908288 Fluid coupler for a stacked pump system
06/01/1999CA2254704A1 Method and apparatus for pumping fluids from a well
05/1999
05/26/1999CN2320821Y Pumping unit for tubingless screw pump
05/26/1999CN1043484C Sand-proof sand-extructing and oil-pumping combined apparatus
05/20/1999WO1999024717A1 Drive head for a rotary-driven rod assembly, especially for driving a sand pump
05/20/1999WO1999018354A3 Walking beam compressor
05/20/1999CA2308164A1 Drive head for a rotary-driven rod assembly, especially for driving a sand pump
05/19/1999CN2319606Y Different phase slide beam balance oil pumping machine
05/12/1999DE19748907C1 Antriebskopf für ein drehantreibbares Gestänge, insbesonders zum Antreiben einer Bohrlochpumpe Drive head for a rotatably driven boom, especially for driving a downhole pump
04/1999
04/28/1999CN2316487Y Deep-well oil pump without floating valve
04/28/1999CN1215134A Six-connecting-rod beam oil pumping mechanism
04/22/1999WO1999019623A2 Hydraulic diaphragm pump
04/21/1999CN2315333Y Secondary balance speed reducer for oil pumping machine
04/21/1999CN2315332Y Near uniform oil pumping machine
04/21/1999CN2315292Y Flexible universal joint for wellhead of oil pumping machine well
04/15/1999WO1999018354A2 Walking beam compressor
04/13/1999US5893708 Rotating piston for ball and seat valve assembly and downhole pump utilizing said valve assembly
04/07/1999CN2313076Y Pumping pipe for deep-well pump
04/07/1999CN2313075Y Crank-swinging type torque-variable oil-beaming machine
03/1999
03/31/1999CN2312346Y 抽油机 Pumping
03/31/1999CN2312345Y Dual linkage rod and distance-increasing type beam oil pumping machine
03/24/1999CN2311633Y High-speed oil absorption machine
03/23/1999CA2245410A1 Triple action pumping system
03/17/1999CN2310873Y Pipe pump for oil production
03/10/1999CN2310180Y Oil pump
03/10/1999CN2310179Y Flexible shaft well pump
03/10/1999CN2310178Y Electricity-saving controller for oil pump
03/03/1999CN2309444Y Tank train
03/03/1999CN2309443Y Speed reducer for deep-well pump
03/03/1999CN2309442Y Beamless geared pumping unit
02/1999
02/24/1999CN2308730Y Water pump for deep well
02/24/1999CN2308729Y Multi-cylinder hydraulic speed regulating and energy saving oil pumping machine
02/24/1999CN2308728Y Power saving device for power supply line of oil pumping machine
02/24/1999CN1208817A Means for fixing well oil pump
02/23/1999US5873411 Double acting reciprocating piston pump
02/18/1999WO1999007979A1 Down-hole, production pump and circulation system
02/17/1999CN2307932Y Straight cylinder half-sealed water pump
02/17/1999CN2307931Y Heat oil recovery oil-well pump
02/10/1999CN2307122Y 同步链条抽油机 Synchronization chain pumping
02/10/1999CN1042053C High-efficiency energy-saving lever oil pumping machine
02/09/1999US5868554 Below the earth surface
02/03/1999CN2306337Y Air-proof sand-proof efficient oil pump
02/03/1999CN2306336Y Whole cylinder type oil pump
02/03/1999CN2306335Y Long stroke beam-pumping unit
02/02/1999US5865245 Stuffing box gland
01/1999
01/28/1999WO1999004166A1 Pumping apparatus for pumping liquids from wells and method for supplying the pumping apparatus with a driving fluid
01/27/1999CN2305499Y Two purpose vortex type negative pressure water pump operated by foot or motor
01/26/1999US5863185 Liquid flow apparatus
01/20/1999EP0891468A1 Pump-off controller
01/20/1999CN2304765Y Sand soil water pump
01/19/1999US5860795 Method for underground-reservoir fluids production with pump drive contained within the wellbore
01/13/1999EP0890025A1 Sucker rod pump actuating device
01/13/1999CN2303945Y Integral-tube type oil-well pump
01/06/1999CN2303095Y Wheel type mobile and balance oil pumping machine
12/1998
12/30/1998CN2302354Y Internal meshing planetary exhauster for removing cooking fumes
12/16/1998CN2300743Y Sand pump for thick oil well
12/16/1998CN2300742Y Hand wheel water pump
12/16/1998CN2300741Y Automatic controlling protection submerged electric pump
12/10/1998WO1998055766A1 Hydraulic pump jack drive system for reciprocating an oil well pump rod
12/09/1998CN2299950Y Submersible electric screw pump
12/09/1998CN2299949Y Self-sucking pump with suction valve
12/09/1998CA2239073A1 Hydraulic reciprocating positive-displacement pumping system
12/08/1998US5846056 Reciprocating pump system and method for operating same
12/08/1998US5845709 Recirculating pump for electrical submersible pump system
11/1998
11/18/1998CN2297565Y Reciprocating pump
11/18/1998CN2297564Y Double clamping pole type pump
11/18/1998CN2297563Y Self-priming pump
11/17/1998CA2209869C Hydraulically driven oil well pump
11/10/1998US5832727 Hydraulic oil well pump drive system
11/04/1998CN2296416Y Electric water pump
11/04/1998CN2296415Y Automatic water pumping and stopping device
11/03/1998US5831353 Modular linear motor and method of constructing and using same
11/03/1998US5829958 Pumping unit with speed reducing means
10/1998
10/28/1998CN2295858Y Ball valve and disc valve connecting pipe type oil sucking pump
10/27/1998US5827051 Regenerative hydraulic power transmission for down-hole pump
10/21/1998CN2295063Y Two-stroke oil pump
10/21/1998CN2295062Y Oil-pump well oil-adding pump
10/20/1998US5825143 Method and apparatus for slowing back spin of a rod string of a progressing cavity pump powered by an electric motor when power is lost
10/20/1998US5823262 For use in terminating actuation of a pumping unit
10/13/1998US5819848 Flow responsive time delay pump motor cut-off logic
10/07/1998CN2293663Y Submerged motor structure
10/07/1998CN2293662Y Wellhead single-acting pressure-reducing extraction-aid pump
10/07/1998CN2293661Y Three times stroke rod oil-well pump
10/07/1998CN1195388A Improvement in deep well pump apparatus
10/07/1998CN1195066A Pumping heating 2 in 1 vane pump oil production method and its device
09/1998
09/30/1998CN2292918Y Electric heated two-cylinder deep well oil pump
09/30/1998CN2292917Y Double action pump for oil-pumping and water injection
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